*{
  box-sizing: border-box;
  padding: 0;
  margin: 0;
}
body{
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: center;
      -ms-flex-pack: center;
          justify-content: center;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  min-height: 100vh;
  background: #eee;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
      -ms-flex-direction: column;
          flex-direction: column;
}
h4{
  padding: 20px 0;
  font-weight: 400;
  color: #1f2f3d;
}
.all-levels{
  margin: auto;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -ms-flex-wrap: wrap;
      flex-wrap: wrap;
  width: 640px;
  max-width: 100%;
}
.level-item{
  width: calc(25% - 10px);
  height: 80px;
  margin: 5px;
  position: relative;
  -webkit-box-shadow: 1px 1px 1px rgba(0,0,0,.3);
  box-shadow: 1px 1px 1px rgba(0,0,0,.3);
  border-radius: 5px;
  color: #fff;
  background: url('images/list_bg.jpg') no-repeat center/cover;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: center;
      -ms-flex-pack: center;
          justify-content: center;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  font-size: 14px;
  cursor: pointer;
  text-decoration: none;
}
